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Script Author: Katja Borchert, Ph.D. ( for Millisecond Software, LLC
Date: 09-17-2012
last updated:  04-12-2018 by K. Borchert ( for Millisecond Software, LLC

Copyright ©  04-12-2018 Millisecond Software


This script implements the Barratt Impulsiveness Scale (BIS-11) described in:

Patton, J.H., Standford, M.S., & Barratt, E.S. (1995). Factor Structure of the Barratt Impulsiveness Scale.
Journal of Clinical Psychology, 51, 768-774.

The default data stored in the data files are:

(1) Raw data file: 'BIS.iqdat' 

date, time, group, subject:					date and time script was run with the current group/subjectnumber 
build:										the Inquisit build 

q*_response:								response given (in assigned values)
q*_latency:									how much time (in ms) the participant spent on the surveypage with this particular question (the last time this particular surveypage was visited)

(2) Summary data file: 'BIS_summary*.iqdat' (a separate file for each participant)

script.startdate:							date script was run
script.starttime:							time script was started
script.subjectid:							subject id number
script.groupid:								group id number
script.elapsedtime:							time it took to run script (in ms)
computer.platform:							the platform the script was run on
/completed:									0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
/totalscore:								the total score (across subscales)
A_Attention-NP_CogComplex:					the scores for each individual subscale

The questionnaire contains 30 questions. Each question is presented with 4 answer choices
(-> "Rarely/Never", "Occasionally", "Often", "Almost Always/Always").

Each of the questions belongs to 6 subscales (derived from 6 first order factors and 3 first order factors)

1. Attention-Attention: 5, 9R, 11, 20R, 28
2. Attention-Cognitive Instability: 6, 24, 26
3. Motor-Motor: 2, 3, 4, 17, 19, 22, 25
4. Motor-Perserverance: 16, 21, 23, 30R
5. Nonplanning-Self Control: 1R, 7R, 8R, 12R, 13R, 14
6. Nonplanning-Cognitive Complexity: 10R, 15R, 18, 27, 29R
(R = reversed scoring, depends on wording)

Scoring: on a 4-point scale
"1" for least impulsive choice to "4" for most impulsive choice
=> Minimum Score: 30
=> Maximum Score: 120

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